Given the option, what project would you choose? one that matches your current skills and knowledge and requires you leading a team, or one where you'll work on something less familiar but you'll be able to collaborate with colleagues?

The best way to answer this question is to think about what you want to gain from the project. Consider which option will give you the most opportunity to develop and strengthen your current skills and knowledge, and which will provide the most meaningful experience. Additionally, you should consider how much support you will have in either project and how much of a challenge you are willing to take on. Ultimately, the best choice will depend on your individual preferences and needs.